Phys.org  August 26, 2024 An international team of researchers (USA – University of Chicago, Italy) described a solution for the eigenstate problem of mixed fermion-boson systems that could be implemented on quantum devices. Based on a generalization of the electronic contracted Schrödinger equation (CSE), they guided a trial wave function to the ground state of any arbitrary mixed Hamiltonian by directly measuring residuals of the mixed CSE on a quantum device. The accuracy of their approach was not limited by the unknown exchange-correlation functional or the uncontrolled form of the exponential assumption. To test the performance of the method, they […]